Tunnel hard rock non-blasting excavation method

A non-blasting, hard rock technology, applied in the direction of tunnels, earthwork drilling, mining equipment, etc., can solve the problems that the construction efficiency is greatly affected, the number of drilling holes is large, and the construction efficiency is affected, achieving significant technical advantages and overcoming the blasting effect , High excavation efficiency

CN113586076AInactive Publication Date: 2021-11-02WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.
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Description

Technical field

[0001] The present invention belongs to the field of tunnel excavation construction method, and specific methods for unobstructure of tunnel, comparative and complete hard rocks.

[0002] technical background

[0003] The excavation of tunnel rocks is usually taken by a drill explosion method. The drill explosion method, that is, through drilling, charging, blasting excavation of rock method, the vibration, noise, dust, dust, etc. produced by drill explosion, has a great impact on the environment. When the surrounding environment is complicated, if it is close to the residentally intensive district, there is a strict control requirement for blasting harmful effects. Therefore, the construction requirements cannot meet the construction requirements in the tunnel excavation of the area that requires strict control of the hazardous effects, and the non-burst excavation method is required.

[0004] In the unmuttled excavation method of tunnels, milling method is the ex...

Examples

Embodiment Construction

[0024] A specific embodiment of the tunnel hard rock non-burst excavation method according to the present invention will be described in detail below with reference to the accompanying drawings.

[0025] like figure 1 As shown, the hard rock section of a project tunnel is 3.9m, the height is 3.9m, and the section is 13.58m. 2 Construction using the technical solution of the present invention, the specific steps are as follows:

[0026] (1) In the palm shedral line 2 and the tunnel axis, the outer interpolation angle is formed, and the contour hole 3 is formed, thereby determining the range of tunnel excavation, in the present embodiment, the contour hole 3 pore size is 76mm, the borehole spacing is 0.5m, and the drilling is 4m.

[0027] (2) According to the range of excavation, choose figure 1 The position of the last row is the position of the drilling into the tank, and the expansion hole 6 is drilled near the position. In the present embodiment, the expansion hole 6 has a hole ...